Printable Hard Sudoku

Set x93nfv. 8 puzzles with an answer key, ready to print.

Hard puzzles start with about 29 givens and need real techniques: pointing pairs, naked pairs and hidden pairs. Paper is a great way to practice them, because you have to keep your own notes honest.

Each free PDF has 8 puzzles, four to a page on US Letter paper, plus an answer key with every solution. Every puzzle has exactly one solution. A new set appears here every day, or you can grab a different set any time.

Puzzles in this set

Hard #1
9 1 6
2 3 8
4 5 7
1 4 2
3 2 1 4 8
8 7 3 1
4 2
5 7 6 1
5 9
Hard #2
3
7 5
4 7 3 1 5
6 9 4 7
9 8 7 6 5
7 2 4 8
1 6 8
4 6
3 8 1
Hard #3
2 1 3 7 5 6
5 4 1
7
5 4 2
9 2 6 5
6 8 4 1
3 9 7 2 1
8 9
4
Hard #4
4
5 7 8 1
3 8 2 6 5
6 5 7 3 8
1 4 5 8
2 6
9 1
4 6 7
2 4 3
Hard #5
1 6
6 3 2
6 3 7
2 4
1 7 3 9 2
4 9 6 1 5
7 6 1 4
6 4
9 5 7
Hard #6
8 7 1
2 3
6 5 8 2
6 2 3
4 5 9
1 8 3 5
1
1 7 2 6 9 3
6 8 5
Hard #7
7 8 2
4 6 8 3 1
1 5
3 1 4
8 6
2 1 5 8 7 6
1 2
4 5 9
7 6 1
Hard #8
1 2 4 5
1 6 7
3 4 8
6 9 4 8
1 5
4 8 6 5 3
6 5 9
2 9 5 3 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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